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GST split right, a UPI QR that really scans, and a WhatsApp message ready to send.

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Studio Pavi

Pavithra Ilango · Motion design & illustration
12, 4th Cross Street, Besant Nagar, Chennai 600090
GSTIN 33ABCPI4821K1Z6

Tax invoice
NX/26-27/0042
Issued 5 Oct 2026
Due 20 Oct 2026
Billed to
Kaapi Kottai Roasters
Suganya Ramalingam
Race Course Road, Coimbatore 641018
GSTIN 33AAKFK7731M1Z2
Place of supply
Tamil Nadu (33)
Item · SAC 998391QtyRateAmount
Coffee bag labels, 3 single-estate blends3₹8,500₹25,500.00
Launch reel, 30 s vertical1₹18,000₹18,000.00
Café menu board, A11₹6,500₹6,500.00
Taxable value₹50,000.00
CGST @ 9%₹4,500.00
SGST @ 9%₹4,500.00
Amount payable₹59,000.00

Rupees fifty-nine thousand only

Scan with any UPI app
Pays ₹59,000.00 to Pavithra Ilango
pavithra.studio@okaxis
NEFT: HDFC Bank · A/c 50200041773021 · IFSC HDFC0001822

Coimbatore’s in Tamil Nadu too, so GST splits 9 + 9.

Suganya Ramalingam
Kaapi Kottai Roasters
Today
NX-26-27-0042.pdf
1 page · 84 kB

Hi Suganya, here’s invoice NX/26-27/0042 from Pavithra Ilango for ₹59,000.00, due 20 Oct. Pay by UPI in one tap:

nxb.in/p/0042
Pay ₹59,000.00 to Pavithra Ilango
10:02 ✓✓

It chases,
so you don’t have to.

Five WhatsApp messages over 21 days, each one a little more direct, all of them polite. They stop the moment the money lands. Here’s the real schedule, drawn to scale.

  1. D0The invoice
    PDF, UPI link and due date in one message.
  2. D3A gentle nudge
    Which apps the link opens in.
  3. D7Part-pay offer
    Any amount now beats the full amount later.
  4. D14Due tomorrow
    Balance only, after thanking them for what came in.
  5. D21Past due, human
    Invites a reply that lands in your chat.
Suganya Ramalingam
Kaapi Kottai Roasters · via Nexbill
Day 0 · Mon 5 Oct
Hi Suganya, here's invoice NX/26-27/0041 from Pavithra Ilango for ₹59,000.00, due on 20 Oct. Pay by UPI in one tap: nxb.in/p/7Hq210:02✓✓
Day 3 · Thu 8 Oct
A gentle nudge: NX/26-27/0041 (₹59,000.00) is due in 12 days. The link opens in GPay, PhonePe, Paytm or your bank app.10:00✓✓
Got it. Will clear it once the Diwali stock is in 🙏11:47
Day 7 · Mon 12 Oct
8 days to go on ₹59,000.00. Paying in parts is fine, the link takes any amount.10:00✓✓
₹30,000.00 received · UPI ref 628714903311 18:31
Day 14 · Mon 19 Oct
Thanks for the ₹30,000! ₹29,000.00 is left on NX/26-27/0041, due tomorrow. Same link: nxb.in/p/7Hq210:00✓✓
Day 21 · Mon 26 Oct
NX/26-27/0041 is 6 days past due, with ₹29,000.00 left. If something's holding it up, reply here and Pavithra will see it.10:00✓✓
Sorry, festival week! Paying now.10:14
₹29,000.00 received · Paid in full 10:16

October, as it lands.

Pavithra’s month on Nexbill. Every coin is a UPI payment, drawn to size.

Received so far
₹1,41,310
Still to come, Dune & Date
₹1,35,000
Average wait after invoicing
9 days
Mon
Tue
Wed
Thu
Fri
Sat
Sun
1
2₹18kThari Films, Madurai
3
4
5
6
7
8₹12kAnbu Organics, Erode
9
10
11
12
13₹30kKaapi Kottai, part
14
15
16₹42kHoysala Works
17
18
19
20
21
22₹9kSelvam Silks, Kanchipuram
23
24
25
26₹29kKaapi Kottai, the rest
27
28
29
30₹1.35LDune & Date, expected
31

Solid: received. Dashed: due 30 Oct from Dubai, zero-rated.

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Still unsure? WhatsApp the team on +91 44 4631 7720. A person in Chennai answers, usually inside the hour.

I earn under ₹20 lakh and I'm not GST-registered. Can I still use Nexbill?

Yes. Switch GST off in settings and Nexbill issues a plain invoice with no tax lines and no GSTIN, which is what you need below the threshold (₹20 lakh a year for services in most states). The UPI QR and reminders work the same. If you register later, flip it back on and your numbering carries on.

How do export invoices work?

If the client is outside India and pays in foreign exchange, the service is a zero-rated export. File a Letter of Undertaking (form RFD-11) on the GST portal once a financial year, paste the ARN into Nexbill, and export invoices print it with “supply meant for export under LUT without payment of IGST”. No tax is charged.

My client deducts TDS. How does that show up?

Tick TDS on the invoice and Nexbill works out 10% under section 194J on your fee, never on the GST, and shows the amount you should actually receive. It then waits for the matching entry in your Form 26AS so you can claim the credit when you file.

Does my client need to install anything?

No. They get a WhatsApp message with a link. It opens a page with the invoice PDF and a Pay button that hands off to GPay, PhonePe, Paytm or any bank's UPI app. Bank transfer details are on the PDF too, for accounts teams that prefer NEFT.

Can a client pay part of an invoice?

Yes. The UPI link accepts any amount. Nexbill records each payment against the invoice, shows the balance, and the next reminder asks only for what's left.

Can I stop the reminders for a particular client?

Pause them for one invoice or for a client altogether, or change the schedule. They stop on their own the moment an invoice is paid in full, so nobody gets chased for money they've already sent.

Is NX/26-27/0042 a valid GST invoice number?

Yes. GST rules ask for a consecutive serial of up to 16 characters, unique within the financial year. Nexbill uses your prefix, the year and a running number, and starts a new series on 1 April.

Where is my data kept, and can I take it with me?

Invoices and client details are stored encrypted on servers in Mumbai. Export everything as PDF and CSV whenever you like. Delete your account and it's gone from our systems within 30 days.

Send your first invoice tonight.

Five invoices a month are free for good. No card, no app for your clients, and the numbering picks up wherever your last invoice left off.

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